Stump-pulling apparatus.



H. L. & F. W. ZIMMERMAN.

STUMP PULLING APPARATUS.

APPLICATION FILED IAN. I5. I9I5.

1,206,970. Patented Dec. 5, 1916.

2 SHEETS SHEET l.

H. L. & F. W. ZIMMERMAN.

sTuMP PULLING APPARATUS.

APPLICATIN FILED JAN. l5. |915.

1 ,206,970. Patented Dec. 5, 1916.

2 SHEETSMSHEET Z.

' UNITE STA@ AIET OFFICE.

HENRY L. ZIMMERMAN AND FREDERICK W. ZIMMERMAN, OF LONE TREE, IOWA.

STUMP-PULLIN G APPARATUS.

Specification of Letters Patent.

Patented Dec. 5, 1916.

Application led January 15, 1915. Serial N o. 2,409.

To all whom t may concern:

Be it known that we, HENRY L. ZIMMER- MAN and FREDERICK W. ZIMMERMAN, citizens of the United States, residing ai; Lone Tree, in the county of JohnsonA and State of Iowa, have invented certain new and useful Improvements in Stump-Pulling Apparatus; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in stump pulling apparatus, and more particularly to such mechanism for controlling and actuating the cable carrying drum as falls within the general class of such devices occupied by the apparatus disclosed in application, Serial N o. 868,473, filed October 28, 1914.

The object in view is to further improve the structure and operation of the apparatus seen in said application.

With this and further objects in view, as will in part hereinafter become apparent and in part be stated, the invention comprises certain novel constructions, combinations and arrangements of parts as hereinafter specified and claimed.

In the accompanying drawing: Figure 1 is a sectional side elevation of an apparatus embodying the features of the present invention. Figs. 2 and 3 are vertical central sections therethrough showing the parts respectively in their released and locked conditions. Fig. 4 is an enlarged detail perspective view of the sweep box and its connected parts detached. Fig. 5 is a horizontal section taken on the plane indicated by line 5, 5 of Fig. 1, looking downu ward. Fig. 6 is a vertical central section taken at right angles to the plane of sections 1, 2 and 3 and on the plane indicated by line 6, 6 of Fig. 5. Fig. 7 is a horizontal section taken approximately on the plane indicated by line 7, 7 of Fig. 1 and looking downward. Figs. 8 and 9 are respectively a view in side elevation and a top plan view of the key sleevedetached. Fig. 10 is a fragmentary plan view of the lower bearing portion of the frame.

Referring to the drawing by numerals, l indicates an open frame having upper and lower horizontal portions, the upper portion being formed with a central opening 2, alined with an opening 3 in the lower horizontal portion. An upstanding flange 4 surrounds the upper end of opening 2.

A hollow spindle 5 is removably mounted in the frame l and has its upper end enlarged to an internally hollow cylinder 6 iitting snugly within the opening 2. The inner surface of the cylinder is notched or formed with interlocking teeth 7, 7 with which is adapted to interlnesh teeth 8 of a locking sleeve or key 9. The key or sleeve is slidingly mounted on a tubular shaft 10 nested within the shaft 5 and having at its upper portion coperating teeth 11 engaging corresponding teeth at the inner periphery of the sleeve 9 as clearly indicated in Fig. 5. The upper portion of the frame 1 is provided with a notch 12 opening into the opening 2 and adapted to permit the movement of a radial finger 13 carried by cylinder 6 to a position underhanging the upper portion of the frame, as seen in Figs. 2 and 3, whereby the shaft 5 is prevented from accidentally shifting vertically upward out of its operative position in the frame. The shaft 10 is formed integral with or otherwise appropriately fixed to a sweep receiving box 14, the sides of which are formed with vertical grooves or guide-ways 15, in which extend upstanding arms 16, 16, of the locking sleeve 9. Outstanding laterally from each arm 16 is a pivot pin 17 on which is eccentrically journaled a disk 18, the two disks 18 being connected by a bail 19 and being-mounted to roll upon the upper edge of the flange 4.

In the former application above mentioned, the structure shown employs teeth similar to teeth 11 so disposed that the weight of the sweep carried by the sweep box is transmitted through said teeth to the engaged portion of the outer sleeve. To relieve the strain at this point in the present structure, the box 14 is provided with depending flanges 20, 20, of transversely arcuate form as seen in Fig. 5 and depending vertically into engagement with the upper edge of the cylinder 6. Each flange 2O is Vpoint to extend in operation just above the flange 4. The side walls of box 14 are providedwith lateral'flanges or brackets 22 which over-hang the disks or eccentrics 18 so as to be engaged thereby during certain portionsl of the operation to transfer the weight of the box from flanges 20 and cylinder 6 to brackets 22, disks 18 and the flange k4, as will hereinafter more fully appear.

' In the structure disclosed in the above mentioned former application, the inner shaft corresponding to shaft 10 terminates a considerable distance short of the lower end of the outer shaft, Yand lateral stresses must be taken up by side contact of the inner with the outer shaft. In the present structure, however, we extend the inner tubular shaft down to a point substantially at the lower end of the outer shaft and at the lower end of the frame and there provide a cross plate 23, carrying an upstanding preferably slightly tapered central core 24, adapted Vto receive and to within shaft 10 so that lateral stresses exerted at the upper end of the shaft and tending to rock the same in any direction are taken up directly by core 24, and the shaft 5 will be relieved from such strain. rIhe cross plate 23 is formed integral with or appropriately fixed to the frame 1 and underlies the lower end of shaft 5. n Keyed on the sleeve 5 is a cable winding spool or drum 25 having upper and lower flanges, the upper flange being formed into an Vannular ratchet 26 engaged by pawl 27 gravity actuated and disposed to engage the teeth of the ratchet.

In operation, the frame 1 is anchored by means of an appropriate connection with a hook 28, and the cable, not shown, which is wound about drum 5 is connected with a stump to be extracted. The locking sleeve 9 is positioned as indicated' in Fig. 3 by the disposition of the bail 19, as indicated, and the sweep connected to box 14 is moved by draft animals or other appropriate means for rotating the drum 25 and taking in the cable. The pawl 27 prevents excessive rearward movement of the drum if the draft animals discontinue the strain on the sweep at any time. The rotation continues until the stump is extracted, and thereupon, the draft animals having stopped, theoperator grasps the bail 19 and swings the same from the position indicated in Fig. 3 to the position indicated in full lines in 2 and thus allows the tension on the cable to be relieved by the revolving of the drum free from connection with the sweep box except that the flanges 20 resting upon the upper edge of cylinder 6 frictionally resist rotation and thus prevent spinning of the drum 25. The operator then advances bail 19 to the dotted line position in F ig. 2, which causes the sleeve 9 to strike the under portion of the box 14 and lift the box and its connected parts to the elevated position with the flanges 20 out of contact with cylinder 6, so that the drum 25 is left entirely free.

It is, of course understood that'the drum is keyed to the shaft 5 at 29, 29, as by having the opening in the drum into which the shaft extends square `or polysided and having the shaft correspondingly formed. `Whenit is desired to lock the sweep to the drum, it is only necessary to move bail 19 from the dotted line position of Fig. 2 to the position seen in Fig. 8. Disks 18 are prevented from rising during rotation by reason of coming in contact with flanges 22, whereby sleeve 9 is positively forced down into its locking position. y

It will be apparent that if the sweep which is usually a comparatively `heavy beam Vor other timber happens to be located so that its weight is off-center with respect to box 14, the shaft 10 will thereby be subjected to a tilting strain, but this strain will be taken up at the lower end ofthe `shaft by its engagement with the core 23. Also the flanges 2O will aid in taking up this lateral strain since they Vare in the longitudinal planes of the box occupied by the sweep, and are so located with respect to the flange 4 that any tendency toward tilting of the box longitudinally in either direction will be taken up as a lateral stress by either one or the other of the fianges V2O according' to the direction of the stress, and the respective flange will bind againstthe inner surface. of flange 4.

l/Vhat we claim is:

1. In stump pulling apparatus, the combi-V nation, with a frame, of nested shafts journaled therein, a drum carried by the outer shaft, a sweep box connected to the inner shaft, flanges pendent therefrom in position to engage the upper end of the outer shaft, and means for detachably connecting the inner and outer shafts.

2. In a stump pulling apparatus, the combination, with a frame, of nested shafts jour- Y nale'd therein, a drum carried by the outer shaft, a sweep box connected to theV inner shaft, flanges pendent therefrom and `alined in the plane of the longitudinal axis of the box and depending in position to engage the outer shaft, and means for detachably connecting the inner and outer shafts.

3. In a stump pulling apparatus, the combination, with a frame, of nested shafts journaled therein, a drum c'arrieduby the outer shaft, a sweep box connected to the inner shaft, flanges pendent therefrom land* alined in the plane of the longitudinal axis of In testimony whereof We affix our` signathe box and depending in position to entures in presence of two Witnesses.

gage the outer` shaft, means for detachably HENRY L. ZIMMERMAN. connecting the inner and outei` shafts, and FREDERICK W. ZIMMERMAN. an annular flange on the frame surrounding Witnesses:

and substantially snugly receiving the de- LOTTA KALLOUS,

pending anges. RUTH LUTZ.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

